. Corrosion and biofouling on the non-heat-exchanger surfaces of an ocean thermal energy conversion power plant : a survey. Corrosion and anti-corrosives; Protective coatings; Ocean thermal power plants. There usually are no hard-shelled forms below the photic and/or mixed layer zone (Figure 7). ' Table 7 lists general relationships between depth and geographic location for some fouling organisms. Marine borers were found attached on "all" surfaces at various depths (down to 7000 ft) in protected areas away from water currents. These borers have been known to bore into materials whic
. Corrosion and biofouling on the non-heat-exchanger surfaces of an ocean thermal energy conversion power plant : a survey. Corrosion and anti-corrosives; Protective coatings; Ocean thermal power plants. There usually are no hard-shelled forms below the photic and/or mixed layer zone (Figure 7). ' Table 7 lists general relationships between depth and geographic location for some fouling organisms. Marine borers were found attached on "all" surfaces at various depths (down to 7000 ft) in protected areas away from water currents. These borers have been known to bore into materials which were "unborable," , lead, concrete, ^., 63,68,72. 6 9 12 15 18 21 24 DURATION OF EXPOSURE (months) 27 Figure 7 - Time to Reach Hard-Shelled Fouling Stage as a Function of Depth The most generally accepted boundary for "insignificant fouling" is 65 miles offshore.'^ At this and greater distances, the fouling, although present and often bothersome, is reduced to manageable levels.'^ Not only 72 is the quantity lessened, but also the species diversity is small; an antifouling system could be less complex as it would need only a narrow spectrum toxin. 29. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Castelli, V. J; David W. Taylor Naval Ship Research and Development Center. Bethesda, Md. : David W. Taylor Naval Ship Research and Development Center
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